---
product_id: 666899030
title: "Crucial 16GB Single DDR4 2666 MT/s (PC4-21300) CL19 DR x8 SODIMM 260-Pin for Mac - CT16G4S266M"
brand: "crucial"
price: "$246.50"
currency: USD
in_stock: true
reviews_count: 8
category: "Crucial"
url: https://www.desertcart.us/products/666899030-crucial-16gb-single-ddr4-2666-mt-s-pc4-21300-cl19
store_origin: US
region: United States of America
---

# 2666 MT/s blazing speed 16GB high-capacity memory 260-pin SODIMM form factor Crucial 16GB Single DDR4 2666 MT/s (PC4-21300) CL19 DR x8 SODIMM 260-Pin for Mac - CT16G4S266M

**Brand:** crucial
**Price:** $246.50
**Availability:** ✅ In Stock

## Summary

> 🚀 Upgrade your Mac, upgrade your hustle!

## Quick Answers

- **What is this?** Crucial 16GB Single DDR4 2666 MT/s (PC4-21300) CL19 DR x8 SODIMM 260-Pin for Mac - CT16G4S266M by crucial
- **How much does it cost?** $246.50 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/666899030-crucial-16gb-single-ddr4-2666-mt-s-pc4-21300-cl19)

## Best For

- crucial enthusiasts

## Why This Product

- Trusted crucial brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Upgrade:** Easy installation with tested reliability ensures zero downtime and instant speed gains.
- • **Future-Proof Your Workflow:** 16GB capacity gives you the headroom to run demanding creative and professional apps effortlessly.
- • **Seamless Mac Compatibility:** Specifically engineered for Retina 5K iMac 2017 & 2019 models for flawless integration.
- • **Trusted Quality & Warranty:** Backed by Crucial’s lifetime warranty and rigorous component-level testing for peace of mind.
- • **Turbocharge Your Mac's Performance:** Boost multitasking and app launch speeds with 2666 MT/s DDR4 memory.

## Overview

The Crucial 16GB DDR4 2666 MT/s SODIMM is a high-performance memory module designed specifically for Retina 5K iMacs (2017 & 2019). With 16GB capacity and a fast 2666 MHz speed, it delivers smoother multitasking, faster app launches, and improved system responsiveness. Its 260-pin form factor ensures perfect compatibility and easy installation, backed by Crucial’s lifetime warranty and extensive testing for reliable, long-term performance.

## Description

Avoid problems upgrading your Mac with compatible Crucial memory. Simple to install and a lifetime warranty, it speeds up your Mac for added productivity. Apple computers have specific memory needs, e.g. In terms of component densities, speeds, and timings, using memory specifically designed for your Mac is therefore important. With over 10 years of experience manufacturing memory for all types of Apple computers, adding Crucial memory is the easiest way to upgrade your Mac.

Review: Good purchase for MAC and Non MAC devices - Totally satisfied with product, I purchased 2 peace's of it and plugged them in my Intel NUC NUC7PJYH (non MAC) and that's it. It detected in a blink. No, issues so far. If you query this product in crucial website they will say its for MAC only and not supported for non MAC devices. But it works well. So if anyone interested in buying this, please go ahead as it is cheaper than non MAC version. Please make sure, your configuration is a proper match 2400 MHz, DDR4 SODIMM, 260 PIN, if this stuff matches you are good to go.
Review: Great Economic RAM upgrade for Apple iMac 5K (Late 2017) - I have an iMac 5K 27 inch (Late 2017, 3.8 GHz) that I use for Music Production. It came with stock 8 GB RAM that wasn't enough for my multimedia projects. I ordered 2 x 8 GB Crucial RAM to add to the existing RAM of the iMac. Delivered within a day, installed in 10 minutes. The iMac booted up within 40 seconds without a fuss and Mac OS had detected the additional RAM. Now with 24 GB RAM, my iMac has enough headroom for my music production and the audio plugins I use in Logic Pro X & Cubase. Gaming performance has improved as well. There has been no lag or latency and no abrupt hanging on Mac OS X or Windows 10. My worry was that the RAM should work well with the existing RAM and there should be no abrupt system failures or reboots. But I am relieved and satisfied. I recommend this RAM for iMac 5K users. For the current price, it is unbeatable value.

## Features

- Compatible with (Retina 5K 2017 27 inches and Retina 5K 2019 27 inches iMac computers)
- Increases the performance of your Mac system
- Improved system responsiveness, faster application launch, multitasking with ease
- Compatible with the latest DDR4 Macs and easy to install
- Each module is subjected to comprehensive testing at the component level and the module itself

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07TKZKT42 |
| Best Sellers Rank | #59,215 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #622 in Memory |
| Brand | Crucial |
| Brand Name | Crucial |
| Column Address Strobe Latency | 19 Nanoseconds |
| Compatible Devices | Ordinateur portable |
| Computer Memory Size | 16 GB |
| Customer Reviews | 4.6 out of 5 stars 2,567 Reviews |
| Form Factor | SO-DIMM |
| Global Trade Identification Number | 00649528820969 |
| Item Type Name | CT16G4S266M |
| Item Weight | 8 Grams |
| Manufacturer | Crucial |
| Memory Speed | 2666 MHz |
| Model Name | CT16G4S266M |
| Number Of Pins | 260 |
| ProcessorSpeed | 2666 MHz |
| Product Features | DDR4 |
| RAM Memory Technology | DDR4 |
| RAM Size | 16 GB |
| Special Feature | DDR4 |
| UPC | 649528820969 |
| Voltage | 1.2 Volts |

## Product Details

- **Brand:** Crucial
- **Computer Memory Size:** 16 GB
- **RAM Memory Technology:** DDR4
- **Memory Speed:** 2666 MHz
- **Compatible Devices:** Ordinateur portable

## Images

![Crucial 16GB Single DDR4 2666 MT/s (PC4-21300) CL19 DR x8 SODIMM 260-Pin for Mac - CT16G4S266M - Image 1](https://m.media-amazon.com/images/I/71erQERW2tL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good purchase for MAC and Non MAC devices
*by P***N on 8 June 2020*

Totally satisfied with product, I purchased 2 peace's of it and plugged them in my Intel NUC NUC7PJYH (non MAC) and that's it. It detected in a blink. No, issues so far. If you query this product in crucial website they will say its for MAC only and not supported for non MAC devices. But it works well. So if anyone interested in buying this, please go ahead as it is cheaper than non MAC version. Please make sure, your configuration is a proper match 2400 MHz, DDR4 SODIMM, 260 PIN, if this stuff matches you are good to go.

### ⭐⭐⭐⭐⭐ Great Economic RAM upgrade for Apple iMac 5K (Late 2017)
*by T***R on 1 May 2019*

I have an iMac 5K 27 inch (Late 2017, 3.8 GHz) that I use for Music Production. It came with stock 8 GB RAM that wasn't enough for my multimedia projects. I ordered 2 x 8 GB Crucial RAM to add to the existing RAM of the iMac. Delivered within a day, installed in 10 minutes. The iMac booted up within 40 seconds without a fuss and Mac OS had detected the additional RAM. Now with 24 GB RAM, my iMac has enough headroom for my music production and the audio plugins I use in Logic Pro X & Cubase. Gaming performance has improved as well. There has been no lag or latency and no abrupt hanging on Mac OS X or Windows 10. My worry was that the RAM should work well with the existing RAM and there should be no abrupt system failures or reboots. But I am relieved and satisfied. I recommend this RAM for iMac 5K users. For the current price, it is unbeatable value.

### ⭐⭐⭐⭐⭐ Used for our iMac
*by P***M on 26 March 2021*

Works beautifully. The installation on 2019 iMac was a bit tricky as you have to open everything...but apart from that the memory works very well. Getting good speed on the iMac.

## Frequently Bought Together

- Crucial 16GB DDR4-2666 SODIMM for Mac
- Synology 2-Bay DiskStation DS224+ (Diskless)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-12*